CN211820320U - Threaded connection anti-loosening structure - Google Patents
Threaded connection anti-loosening structure Download PDFInfo
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- CN211820320U CN211820320U CN202020095697.6U CN202020095697U CN211820320U CN 211820320 U CN211820320 U CN 211820320U CN 202020095697 U CN202020095697 U CN 202020095697U CN 211820320 U CN211820320 U CN 211820320U
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- bolt
- nut
- threaded connection
- cylindrical pin
- loosening
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Abstract
The utility model discloses a threaded connection anti-loosening structure, wherein threads (1.1) are uniformly distributed on a bolt (1) from top to bottom, the end threads (1.1) of the bolt (1) are connected with a nut (2), and a conical hole (4) is arranged in the middle of the end screw rod of the nut (2) of the bolt (1); a flange (5) is welded at one end of the cylindrical pin (3); the cylindrical pin (3) can be inserted into a tapered hole (4) arranged in the middle of the bolt (1). The nut and the bolt overcomes the defect that the connection relation between the bolt and the nut in the prior art cannot maintain the pretightening force of threaded connection, and has the advantages of simple integral processing and easy installation of the bolt and the nut.
Description
Technical Field
The utility model relates to bolt and nut coupling spare's technical field, more specifically is a threaded connection locking structure.
Background
In the construction and machinery fields, bolts and nuts are often used to fasten structures, but the bolts and nuts are loosened due to changes in the external environment, such as changes in temperature and humidity, and vibrations of the structures themselves.
The conventional anti-loosening method for threaded connection in engineering at present comprises the steps of adopting an elastic washer in bolt and nut assembly, using thread anti-loosening glue or modifying a thread structure (such as a Down's thread) and the like. However, some of these methods of preventing loosening of the threaded connection only prevent the bolt or nut from loosening, and do not serve to maintain the preload of the threaded connection. Some are costly and some are cumbersome to install.
For this reason, a structure for solving the above problems is urgently required.
Disclosure of Invention
The utility model aims to overcome the weak point of above-mentioned background art, and provide a threaded connection anti loosening structure.
The utility model aims at being implemented through the following technical scheme: a threaded connection anti-loosening structure comprises a bolt, a nut, a cylindrical pin, a tapered hole and a flange; the bolt is uniformly provided with threads from top to bottom, the end part of the bolt is in threaded connection with a nut, and the bolt is provided with a conical hole in the middle of the nut end screw rod; a flange is welded at one end of the cylindrical pin; the cylindrical pin can be inserted into a tapered hole arranged in the middle of the bolt.
In the above technical scheme: the depth of the taper hole is matched with the thickness of the nut.
In the above technical scheme: the length of the cylindrical pin is matched with the depth of the tapered hole.
In the above technical scheme: the thread is in interference fit with the nut.
The utility model has the advantages of as follows: 1. the bolt and the nut in the utility model are connected in interference fit, the vibration or impact bearing performance is good, and the effective pretightening force of the threaded connection can be maintained; 2. the utility model provides a bolt and nut make bolt and nut firm in connection reliable through reasonable bell mouth and cylindric lock design. 3. The utility model provides a bolt and nut whole processing is simple, the installation is easy, economic nature.
Drawings
Fig. 1 is a schematic view of the overall cooperation structure of the present invention.
Fig. 2 is a schematic cross-sectional view of fig. 1.
Fig. 3 is a schematic structural diagram of the middle bolt of the present invention.
Fig. 4 is a schematic view of a cross-sectional structure of the middle bolt of the present invention.
Fig. 5 is a schematic structural diagram of the cylindrical pin of the present invention.
In the figure: bolt 1, screw thread 1.1, nut 2, cylindric lock 3, bell mouth 4, flange 5.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary; while the advantages of the invention will be apparent and readily appreciated by the description.
Referring to FIGS. 1-5: a threaded connection anti-loosening structure comprises a bolt 1, a nut 2, a cylindrical pin 3, a tapered hole 4 and a flange 5; the bolt 1 is uniformly provided with threads 1.1 from top to bottom, the threads 1.1 at the end part of the bolt 1 are connected with a nut 2, and a conical hole 4 is formed in the bolt 1 in the middle of the screw rod at the end of the nut 2; a flange 5 is welded at one end of the cylindrical pin 3; the cylindrical pin 3 can be inserted into a tapered hole 4 arranged in the middle of the bolt 1.
The depth of the taper hole 4 is matched with the thickness of the nut 2. The depth of the taper hole 4 is matched with the thickness of the nut 2, so that the tight fit of the connection contact surface of the bolt and the nut is ensured.
The length of the cylindrical pin 3 is matched with the depth of the tapered hole 4. The depth of the cylindrical pin 3 is matched with that of the tapered hole 4, so that the tapered hole can be effectively expanded.
The thread 1.1 and the nut 2 are in interference fit. Interference fit between the threads 1.1 and the nuts 2 ensures that the bolts 1 and the nuts are fully extruded, and ensures that the bolt and the nut are tightly matched with each other in a connecting contact surface.
The utility model discloses still include following specific use: when the workpiece structure needs to be fastened and connected, the bolt 1 and the nut 2 are assembled; and applying a certain torque to the bolt or the nut so as to complete the pre-tightening force assembly connection of the connection structure.
As the tail end of the bolt 1 is provided with a tapered hole 4, after the pretightening force assembly connection of the bolt 1 and the nut 2 is completed, the cylindrical pin 3 with the flange 5 is inserted into the tapered hole 4 at the tail end of the bolt 1, and the bottom surface of the flange 5 of the cylindrical pin 3 is preferably contacted with the tail end of the bolt 1.
After the cylindrical pin 3 is inserted into the tapered hole 4 of the bolt 1, the rod part of the bolt 1 is subjected to expansion deformation, and the thread 1.1 on the bolt 1 subjected to expansion deformation is in interference fit with the internal thread of the nut 2, so that the threaded connection is locked, and the purpose of preventing the threaded connection from loosening is achieved. When the bolt 1 and the nut 2 need to be disassembled, the cylindrical pin 3 with the flange 4 is taken down, and then the bolt 1 or the nut 2 is reversely screwed.
The utility model discloses a threaded connection anti loosening structure, whether normal when the follow-up locking design effect of inspection of needs is, only need the inspection cylindric lock 3 whether from 1 tail end of bolt bell mouth 4 not hard up or pine take off can. If the cylindrical pin 3 is loosened or loosened relative to the tapered hole 4, the anti-loosening design effect of the threaded connection is invalid.
Compared with other spring washers or nylon anti-loosening modes, the anti-loosening device can not only achieve real and effective thread anti-loosening, but also visually check whether the anti-loosening design of threaded connection is invalid or not; and the screw thread is convenient to disassemble after anti-loosening design.
The above-mentioned parts not described in detail are prior art.
Claims (4)
1. The utility model provides a threaded connection anti loosening structure which characterized in that: the bolt comprises a bolt (1), a nut (2), a cylindrical pin (3), a tapered hole (4) and a flange (5); threads (1.1) are uniformly distributed on the bolt (1) from top to bottom, the end threads (1.1) of the bolt (1) are connected with a nut (2), and a conical hole (4) is formed in the bolt (1) in the middle of a screw rod at the end of the nut (2); a flange (5) is welded at one end of the cylindrical pin (3); the cylindrical pin (3) can be inserted into a tapered hole (4) arranged in the middle of the bolt (1).
2. A threaded connection loosening prevention structure as claimed in claim 1, wherein: the depth of the conical hole (4) is matched with the thickness of the nut (2).
3. A threaded connection looseness prevention structure according to claim 1 or 2, wherein: the length of the cylindrical pin (3) is matched with the depth of the tapered hole (4).
4. A threaded connection loosening prevention structure as claimed in claim 3, wherein: the thread (1.1) and the nut (2) are in interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020095697.6U CN211820320U (en) | 2020-01-16 | 2020-01-16 | Threaded connection anti-loosening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020095697.6U CN211820320U (en) | 2020-01-16 | 2020-01-16 | Threaded connection anti-loosening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211820320U true CN211820320U (en) | 2020-10-30 |
Family
ID=72990394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020095697.6U Active CN211820320U (en) | 2020-01-16 | 2020-01-16 | Threaded connection anti-loosening structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211820320U (en) |
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2020
- 2020-01-16 CN CN202020095697.6U patent/CN211820320U/en active Active
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